Open AccessA high‐spatial‐resolution three‐dimensional detector array for 30–200 keV X‐rays based on structured scintillators
Author(s) -
Olsen U. L.,
Schmidt S.,
Poulsen H. F.
Publication year - 2008
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049508011370
Subject(s) - scintillator , detector , physics , optics , image resolution , resolution (logic) , photon , ray tracing (physics) , homogeneous , angular resolution (graph drawing) , computer science , mathematics , combinatorics , artificial intelligence , thermodynamics
A three‐dimensional X‐ray detector for imaging 30–200 keV photons is described. It comprises a set of semi‐transparent structured scintillators, where each scintillator is a regular array of waveguides in silicon, and with pores filled with CsI. The performance of the detector is described theoretically and explored in detail through simulations. Based on available hardware, a spatial resolution of 1 µm is obtainable. The resolution of a single screen is shown to be determined only by the pitch, at least up to 100 keV. In comparison with conventional homogeneous screens, an improvement in efficiency by a factor of 5–15 is obtainable. The cross‐talk between screens in the three‐dimensional detector is shown to be negligible. The three‐dimensional concept enables ray‐tracing and super‐resolution algorithms to be applied.